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参数资料
| 型号： | TC3405VQRTR |
| 元件分类： | ADC |
| 英文描述： | 4-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO16 |
| 封装： | QSOP-16 |
| 文件页数： | 1/12页 |
| 文件大小： | 68K |
| 代理商： | TC3405VQRTR |
TC3405
TC3405-1 12/7/99
TelCom Semiconductor reserves the right to make changes in the circuitry and specifications of its devices.
FEATURES
s
16-Bit Resolution at Eight Conversions Per
Second, Adjustable Down to 10-Bit Resolution at
512 Conversions Per Second
s
1.8V – 5.5V Operation, Low Power ..........................
Operating: 250
A; Sleep: 35 A
s
One Differential and Three Single Ended Inputs
with Built-In Multiplexer
s
MicroPort Serial Bus Requires Only Two
Interface Lines
s
Uses Internal or External Reference
s
VDD Monitor and Reset Generator Operational in
Shutdown Mode
s
Automatically Enters Sleep Mode When Not In Use
s
16-Pin QSOP and PDIP Packages
TYPICAL APPLICATIONS
s
Consumer Electronics, Thermostats, CO
Monitors, Humidity Meters, Security Sensors
s
Embedded Systems, Data Loggers, Portable
Equipment
s
Medical Instruments
GENERAL DESCRIPTION
The TC3405 is a low cost, low power analog-to-digital
converter based on TelCom’s Sigma-Delta technology. It
performs 16-bit conversions (15-bit plus sign) at up to eight
per second. The device is optimized for use as microcontroller
peripherals in low cost, battery operated systems. A voltage
reference is included, or an external reference can be used.
A VDD monitor with reset generator provides Power-On
Reset and Brown-out protection.
The TC3405’s 2-wire MicroPortdigital interface is
used for starting conversions and for reading out the data.
Driving the SCLK line low starts a conversion. After the
conversion starts, each additional falling edge (up to six)
detected on SCLK for t4 seconds reduces the A/D resolution
by one bit and cuts conversion time in half. After a conver-
sion is completed, clocking the SCLK line puts the MSB
through LSB of the resulting data word onto the SDAT line,
much like a shift register. The parts automatically sleep
when not performing a data conversion.
The TC3405 is available in PDIP and QSOP packages.
ORDERING INFORMATION
Part No.
Package
Temp. Range
TC3405VPE
16-Pin PDIP (Narrow)
0
°C to +85°C
TC3405VQR
16-Pin QSOP (Narrow)
0
°C to +85°C
PIN CONFIGURATIONS
16-Pin PDIP/QSOP
1
16
215
314
413
512
611
710
IN4
89
IN1–
IN2
REFIN
GND
A0
V
DD
SDAT
REFOUT
TC3405
SCLK
A1
RESET
VTH
IN3
ENABLE
IN1+
TYPICAL APPLICATION
TC3405
Controller
ENABLE
SDAT
SCLK
AO
AI
RESET
REFOUT
REFIN
VTH
IN3+
IN4+
IN2+
IN1–
IN1+
I/01
I/02
I/03
I/04
RST
VBATT
C1
0.1
F
R1
R2
R3
Input 1
Input 2
Input 3
Input 4
+
VDD
130 K
110 K
390
10%
VBATT
+
–
+
R6
100K
VCC
16-Bit Low Cost, Low Power
∑ – A/D Converter
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